Question

我长期陷入困境。

我有一个orders客户的表格，我希望得到4种类型的结果，如

1st: All orders with status=place

然后2nd: All orders with status=place and customer is new（此客户的订单表中没有以前的记录），

然后3rd: All orders with status=place and customer have at least 1 order delivered and never returned previous order，

然后4th: All orders with status=place and customer have atleast 1 order with status=returned

第一步的查询工作正常，但我不知道得到其他结果。我知道它就像一个任务，但我需要帮助。

我尝试第一步

SELECT o.order_id, o.customer_id, o.order_status_id, 
FROM `order` o  
WHERE (o.order_status_id = '1' 
AND o.payment_code <> 'paytabs' 
AND o.payment_code <> 'pp_express') 
ORDER BY o.order_id DESC

这给了我第一步的完美结果。我正在使用OpenCart 2.2.0.0

数据库结构

|order_id |status | payment_code |customer_id |
|---------|-------|--------------|------------|
| 10      | place | cod          |   5        |
| 11      | delvr | cod          |   4        |
| 12      | return| pp_express   |   5        |
| 13      |process| paytabs      |   2        |

任何帮助或建议将不胜感激。向我询问你需要的任何东西。

Answer 1

不确定您的数据库结构，但我会尝试...

广告2：

SELECT o.order_id, o.customer_id, o.order_status_id, 
FROM `order` o 
WHERE (o.order_status_id = '1' 
AND o.payment_code <> 'paytabs' 
AND o.payment_code <> 'pp_express') 
AND o.customer_id NOT IN (SELECT o2.customer_id from order o2 WHERE o2.order_id != o.order_id AND o2.customer_id = o.customer_id)
ORDER BY o.order_id DESC

因此，广告4：

SELECT o.order_id, o.customer_id, o.order_status_id, 
FROM `order` o 
WHERE (o.order_status_id = '1' 
AND o.payment_code <> 'paytabs' 
AND o.payment_code <> 'pp_express') 
AND o.customer_id IN (SELECT o2.customer_id from order o2 WHERE o2.order_status = 'returned')
ORDER BY o.order_id DESC

现在为3：

SELECT o.order_id, o.customer_id, o.order_status_id, 
FROM `order` o 
WHERE (o.order_status_id = '...?') 
AND o.customer_id NOT IN (SELECT o2.customer_id from order o2 WHERE o2.order_status = 'returned')
AND o.customer_id IN (SELECT o3.customer_id from order o3 WHERE o3.order_status = 'delivered')
ORDER BY o.order_id DESC

BTW：我强烈建议重命名表“order”，因为“order”是一个SQL关键字。

Answer 2

我认为如果你想用一个查询来做这件事，你应该使用Union。

其他方式，当同一客户遇到2个contidions时，你只会看到一个。

https://www.w3schools.com/sql/sql_union.asp

Answer 3

对于第二个查询：您只需在SQL中添加一个AND子句： AND user_id = 0

假设插入新订单时user_id = 0（如果这是新用户）

Answer 4

查询：查询是根据您提出的问题和您的订单表结构（我正在考虑您没有创建任何列，如created_at和updated_at）。

从订单中选择*，其中status =＆＃39; place＆＃39;;
从订单中选择orders.order_id，orders.customer_id，其中status =＆＃39; place＆＃39; GROUP BY order_id，customer_id HAVING COUNT（customer_id）= 1;
从订单a astatus中选择a.order_id，a.customer_id（从订单b中选择b.status，其中a.order_id = b.order_id和状态＆lt;＆gt;＆＃39;返回＆＃ 39;）和a.status =＆＃39;地点＆＃39; GROUP BY a.order_id，a.customer_id HAVING COUNT（a.customer_id）＆gt; = 1;
从订单a astatus中选择a.order_id，a.customer_id（从订单b中选择b.status，其中a.order_id = b.order_id和status =＆＃39; return＆＃39;）和a.status =＆＃39;地点＆＃39; GROUP BY a.order_id，a.customer_id HAVING COUNT（a.customer_id）＆gt; = 1

加入条件的多个

4 个答案: